Understanding Ip CCTV

[fattony]

Hi

 

I half understand the IP but I know it’s way more complex than what limited info I know and I want to understand it better, is there a course I could attend?

 

My understanding is that the NVR is given a IP address, when a camera is plugged into it the NVR gives each camera a unique IP address, we can log into each camera via a web browser and edit the settings of the cameras.

 

A while ago I installed a number of cameras and each one I setup on my laptop giving it a IP address (issued by IT) subnet mask etc and plugged it into the network, everything worked fine

 

Sometimes I see companies install their own network for CCTV bypassing any possible IT issues, what’s the best practice here?

 

A couple of weeks we diagnosed a Axis IP camera as faulty, it was replaced and worked for about 24 hours then just dropped off line, our IP guy is on holiday so muggins will attend and reboot the camera hopefully getting it back on line but what would make it drop off?

 

it seems like you need to do a course in networking and fully understand IP address, subnet and dns?

 

Appreciate any help you can give

[al-yeti]

1 hour ago, fattony said:

Hi

 

I half understand the IP but I know it’s way more complex than what limited info I know and I want to understand it better, is there a course I could attend?

 

My understanding is that the NVR is given a IP address, when a camera is plugged into it the NVR gives each camera a unique IP address, we can log into each camera via a web browser and edit the settings of the cameras.

 

A while ago I installed a number of cameras and each one I setup on my laptop giving it a IP address (issued by IT) subnet mask etc and plugged it into the network, everything worked fine

 

Sometimes I see companies install their own network for CCTV bypassing any possible IT issues, what’s the best practice here?

 

A couple of weeks we diagnosed a Axis IP camera as faulty, it was replaced and worked for about 24 hours then just dropped off line, our IP guy is on holiday so muggins will attend and reboot the camera hopefully getting it back on line but what would make it drop off?

 

it seems like you need to do a course in networking and fully understand IP address, subnet and dns?

 

Appreciate any help you can give

Some nvrs have built in IP server , so will allocate IP for you

 

Some.equipment is all manually assigned 

 

Dual port nvrs are good , but some more complicated than others 

 

DNS is an issue lol

 

Subnets need to be common between NVR and cameras in most cases I think

[al-yeti]

 

Axis camera or any camera dropping off could be many reasons 

Like IP conflict 

Needs firmware update

[james.wilson]

DHCP is the protocol that sort address's I would always static assign each camera and never use dhcp without a reservation

[fattony]

Thanks, I've been doing some youtube on networking and its becoming clearer,

 

Say you have a dedicated router (I imagine this would apply for residential systems)

 

1) Plug the nvr into the router and enable dhcp to get a ip address, then disable it so that ip address becomes locked to the nvr

2) Plug the cameras into the router and same again enable dchp to get a ip address then disable it

3) With laptop connected to the same router we can connect to the camera via web browser & ip address to edit the settings of the camera

 

Assuming I'm right on this so far, scale this up to a commercial building where they could have different subnet settings, I imaging there would tend to be a IT company involved so you could ask to connect to the existing switch or they may prefer you fit your own switch (presume you guys have done both at some point) now with a large IT structure they may use different subnet for different equipement and may say all cctv needs to be 255.255.200.0 for example and voip phones take 255.255.195.0, ground floor IT is 255.255.210.0

 

Does that ever happen as it could eliminate ip conflicts as from what I understand a IP address 192.168.1.1 with a subnet of 255.255.255.0 cant talk to a IP address 192.168.1.1 with a subnet of 255.255.1.0

 

So in a long winded way if I'm correct I guess I'm asking if you cant have a dedicated switch would it be wise to request a dedicated subnet so nothing IT do should effect the IP address of the cameras?

 

Apologies for the long post a few things clicked into place (I think after watching some youtube)

 

 

 

[al-yeti]

47 minutes ago, fattony said:

Thanks, I've been doing some youtube on networking and its becoming clearer,

 

Say you have a dedicated router (I imagine this would apply for residential systems)

 

1) Plug the nvr into the router and enable dhcp to get a ip address, then disable it so that ip address becomes locked to the nvr

2) Plug the cameras into the router and same again enable dchp to get a ip address then disable it

3) With laptop connected to the same router we can connect to the camera via web browser & ip address to edit the settings of the camera

 

Assuming I'm right on this so far, scale this up to a commercial building where they could have different subnet settings, I imaging there would tend to be a IT company involved so you could ask to connect to the existing switch or they may prefer you fit your own switch (presume you guys have done both at some point) now with a large IT structure they may use different subnet for different equipement and may say all cctv needs to be 255.255.200.0 for example and voip phones take 255.255.195.0, ground floor IT is 255.255.210.0

 

Does that ever happen as it could eliminate ip conflicts as from what I understand a IP address 192.168.1.1 with a subnet of 255.255.255.0 cant talk to a IP address 192.168.1.1 with a subnet of 255.255.1.0

 

So in a long winded way if I'm correct I guess I'm asking if you cant have a dedicated switch would it be wise to request a dedicated subnet so nothing IT do should effect the IP address of the cameras?

 

Apologies for the long post a few things clicked into place (I think after watching some youtube)

 

 

 

More or less yes , and obviously cameras need to be on same subnet 

 

This kind of stuff dual nic NVR work best 

[james.wilson]

no you need to assign an address it may not keep its address if you disable dhcp. Also if you do disable it on the router then other devices wont work unless they are assigned a static ip manually

[Specialist]

I think you'll find that Tavcom training do all the courses you need & they're a well established and respected company.

[fattony]

I went to this site today to have a nose at it,  25 cameras wired into 2 server rooms and were setup on their own subnet 10.9.240 but for some reason I found a camera at 192.168.0, this one had dropped off and needed a reboot, site did say that all cameras randomly drop off and have done since they were installed (not by us) after a reboot they start working which could I guess be firmware if they are  on their own subnet (no possible ip conflict etc)

 

Unfortunately no one on site know the login details for the other 24 cameras so I presume its a case of reset each camera and start again updating firmware as you go, not really my issue we dont maintain it so up to them

[al-yeti]

5 minutes ago, fattony said:

I went to this site today to have a nose at it,  25 cameras wired into 2 server rooms and were setup on their own subnet 10.9.240 but for some reason I found a camera at 192.168.0, this one had dropped off and needed a reboot, site did say that all cameras randomly drop off and have done since they were installed (not by us) after a reboot they start working which could I guess be firmware if they are  on their own subnet (no possible ip conflict etc)

 

Unfortunately no one on site know the login details for the other 24 cameras so I presume its a case of reset each camera and start again updating firmware as you go, not really my issue we dont maintain it so up to them

I say bandwidth problem if all cameras doing it from time to time 

 

Is there a homehub involved anywhere lol?